It probably depends greatly on the exact height of your pinions and gudgeons (and thus the height of your tiller hinge point). I'm sure the height is (in theory) standardized, but (like everything on a boat) some variance is to be expected. Even a 1/4" or 1/2" difference in rudder height would make a significant difference in the tiller / traveler clearance, and thus in how high you can raise the tiller.
My Ruddercraft tiller doesn't swing up nearly as far as
@Gene Neill's; I'm not sure if that's a difference in mounting height or the difference between a 1981 traveler bar and his '88.
I've thought of replacing one of the forward tiller mounting nuts with a wing-nut, or replacing one of those bolts with a pin. So that the tiller could be released to pivot farther forward (pivoting within the metal side sheets, that is). But I'm not (yet) gutsy enough to make any changes in such a crucial component (and that's from someone who built his own backstay and bowsprit
).